LWIR Optical Windows | Multispectral ZnS Domes | IR Protection Optics Felix Glass supplies standard FLIR grade and HIP multispectral CVD ZnS infrared windows, hemispherical domes and blanks for LWIR thermal imaging, common-aperture multi-sensor and rugged EO/IR systems. CVD ZnS Window / Dome | FLIR Grade & HIP Multispectral | LWIR Optics CVD Zinc Sulfide (ZnS) is the workhorse LWIR material for 8–14μm thermal imaging. Standard FLIR grade ZnS delivers excellent long-wave infrared transmission. HIP hot isostatic pressing converts it to multispectral ZnS, extending usable range into visible and near-infrared for common-aperture sensors. Material substrate does not equal final performance grade. Please specify grade, wavelength band and coating requirements to avoid improper selection. Interferometer Inspection Precision Polishing Finished Component Detail All CVD ZnS windows and domes go through interferometer and spectral performance inspection before delivery. LWIR AR coating reduces surface reflection and maximizes long-wave infrared transmission. DLC coating improves scratch resistance and environmental durability for field deployment. Combined AR+DLC coating is recommended for harsh airborne, marine and outdoor environments. Learn more about infrared optical coating technology. To generate an accurate quotation within 24 hours, please prepare below information: Standard FLIR grade ZnS is optimized only for 8–14μm LWIR. HIP hot isostatic pressing removes scattering centers, enabling visible+NIR+LWIR multispectral transmission for common-aperture sensors. ZnS is softer and less water-resistant than sapphire. Sapphire is preferred for deep subsea; ZnS suits dry-air or low-humidity airborne thermal payloads. No strict fixed MOQ. We support prototype, small‑batch and large‑volume manufacturing for custom ZnS optics.
Custom CVD ZnS IR Window Supplier
OEM Manufacturing | AR / DLC Coating | Custom SpecificationsMaterial & Grade Overview
Key Specifications & Custom Options
Substrate Material
CVD ZnS (FLIR Grade / HIP Multispectral Grade)
Shape
Flat window, disc, hemispherical dome, plano blank, custom profile
Size Range
Dia 5mm‑300mm, custom thickness, dome radius & edge geometry
Surface Quality
20‑10 /40‑20 scratch‑dig, customized per customer drawing
Working Wavelength Band
FLIR Grade: 8–14μm; Multispectral HIP ZnS: 0.4–14μm
Coating Options
Uncoated, LWIR AR coating, DLC hard coating, combined AR+DLC
Custom Machining
Edge chamfer, counterbore, O‑ring groove, stepped flange, dome machining
Inspection
Spectrophotometer, interferometer, visual defect inspection, material certificate available
Manufacturing & Inspection Evidence
Typical Application
Coating Selection Guide
Order & Quotation Requirements (Valid RFQ Checklist)
Send Drawing For Quote
FAQ Snippets
What is the difference between FLIR grade ZnS and multispectral HIP ZnS?
Can CVD ZnS dome be used underwater or subsea?
Is there fixed MOQ for CVD ZnS windows and domes?
Related Products
- What is the minimum order quantity for custom precision optical glass components?
FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.
- Do you offer one-stop custom optical glass processing services?
Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.
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With 19 years of experience as a precision optical glass expert, we provide comprehensive and satisfactory customized solutions.
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